(High Voltage Resistor Selection Guide: Performance, Reliability & Supply Chain Benchmarking)

Abstract

This white paper provides a comprehensive, in-depth technical and supply chain comparative analysis of two major brands in the high-voltage thick film resistor sector—the industry benchmark CADDOCK Electronics and the emerging high-performance alternative HVC Components. We conduct detailed evaluations across multiple dimensions including core technical parameters (resistance tolerance, VCR, TCR, parasitic inductance), product reliability, dimensional compatibility, as well as supply chain and cost-effectiveness. Research data demonstrates that HVC delivers technical performance comparable to CADDOCK in the high-voltage thick film resistor field, while offering significant advantages in price (20% cost reduction) and delivery cycle (60% shorter lead times), making it an ideal choice for seeking high-performance domestic alternative solutions.

1. Introduction

High-voltage application fields such as medical imaging equipment (X-ray, CT), industrial power supplies (high-voltage inverters), precision testing instruments, and aerospace systems impose stringent requirements on high-voltage resistor performance. These components must not only withstand high voltages but also exhibit extremely low temperature coefficient (TCR) and voltage coefficient (VCR).

CADDOCK Electronics is renowned globally for its high precision. However, its 12–20 week lead times and geopolitical supply chain risks have become bottlenecks for production scaling. This white paper responds to the urgent market demand for "second-source" options, demonstrating through detailed actual test data how HVC Components provides a more resilient solution without sacrificing performance.

2. Technical Background: The Decisive Role of Thick Film Technology in High-Voltage Applications

2.1 Key Performance Parameter Definitions

In high-voltage environments, resistor selection must meet the following core parameters:

• Voltage Coefficient (VCR): This is the key differentiator between high-voltage and ordinary resistors. High electric fields enhance the tunneling effect of conductive particles, causing resistance to decrease. Low VCR is essential for ensuring linearity of high-voltage dividers.
• Low Parasitic Inductance: In pulsed power supplies and high-frequency switching applications, low inductance is critical for maintaining signal integrity.
• Long-term Stability: Under sustained high-voltage loading at thousands of volts, resistance drift (Load Life Stability) must remain within acceptable limits.

2.2 Process Route Comparison

• CADDOCK: Utilizes proprietary metal oxide deposition technology and micro-photolithography processes, delivering excellent performance but at high cost with slow capacity expansion.
• HVC: Employs advanced ruthenium oxide thick film printing and high-temperature sintering processes. Through optimized microstructure of the glass phase and conductive phase, HVC successfully achieves "instrument-grade" performance at industrial-level cost, showing significant advantages in high-voltage withstand capability and power density.

3. Quick Selection Guide for Popular Models

0.5W – 1W Precision Instrument Grade

1W – 3W Medium Power Supply Grade

5W – 15W High Voltage Load Grade

4. HVC Part Numbering System

HVR-[Series]-[Tube Diameter × Tube Length]-[Resistance Value]-[Tolerance]-[Temp Coefficient]-[Voltage]

Ordering example: Replace MG715-10M-1% → HVR-BSP-7×19-10M0-F-25-2k

5. Typical Alternative Case Studies

6. Core Technical Specifications — Lab Verified Data

To verify HVC's capability as a CADDOCK alternative, laboratory testing compared corresponding models from both manufacturers (CADDOCK MG715 vs. HVC PF-1.5W).

6.1 Dynamic Parameters: Voltage Coefficient (VCR) Comparison

• Test conditions: 10kΩ resistance, voltage stepped from 0V to 5kV.
• Technical interpretation: Lower VCR values indicate better linearity of resistance under high voltage.

Conclusion: Thanks to optimized paste formulation, HVC demonstrates slightly better resistance stability under high voltage than CADDOCK, fully meeting precision divider requirements.

6.2 High-Frequency Characteristics: Parasitic Inductance Comparison

• Test method: Network analyzer measurement at 100MHz.

7. Reliability and Environmental Stress Testing

For lifespan concerns in industrial and medical applications, we conducted destructive testing per MIL-PRF-55342 standards.

7.1 High-Temperature Aging Test (1000 hours)

• Conditions: 125°C ambient temperature, rated power applied, sustained for 1000 hours.

7.2 Ultimate High-Voltage Stress Test

• Conditions: 1.5× rated voltage applied, sustained for 100 hours (sample size n=100).

8. Mechanical Compatibility and Cross Reference

HVC products are designed to strictly adhere to CADDOCK's physical dimension standards, ensuring Form-Fit-Function (3F) level in-situ replacement.

8.1 Dimensional Measurement (MG715 example)

8.2 Mainstream Series Cross-Reference

9. Supply Chain and Business Value Analysis

Assuming technical parity, HVC provides supply chain managers with highly attractive business value.

10. Conclusion and Selection Recommendations

Based on comprehensive technical performance, reliability data, and supply chain performance, the HVC HVR series has demonstrated its feasibility and superiority as a CADDOCK HV resistor alternative.

Selection recommendations:

• Recommended HVC scenarios: Industrial and medical projects pursuing supply chain security (dual-source strategy), cost optimization, and fast delivery (NPI phase).
• Retain CADDOCK scenarios: Limited to military or aerospace programs where contracts explicitly require "Made in USA" components.

By introducing HVC as a strategic partner, enterprises can resolve single-source supply chain risk and improve end-product competitiveness through cost and efficiency gains.

Start Alternative Verification

HVC provides free samples and technical support to help you complete specification confirmation within 48 hours.